NimbocastMarion, IL Weather
Live radar, hourly and 7-day forecast, and National Weather Service alerts for Marion, Williamson County, Illinois.
Updated Jul 29, 2026, 2:17 PM local time · Radar refreshes every 5 minutes
☀️
Marion
85°F
Wind 7 mph
Humidity 50%
Cloud cover 0%
UV index 8
Alerts 0
Active alerts
✓
No active National Weather Service alerts for Marion, IL.
Marion weather radar
Light
Heavy
Next 24 hours
Now
☀️
85°F
3 PM
☀️
86°F
4 PM
☀️
87°F
5 PM
☀️
87°F
6 PM
☀️
86°F
7 PM
☀️
83°F
8 PM
☀️
79°F
9 PM
☀️
76°F
10 PM
☀️
74°F
11 PM
☀️
73°F
12 AM
☀️
72°F
1 AM
☀️
71°F
2 AM
☀️
70°F
3 AM
☀️
69°F
4 AM
☀️
67°F
5 AM
☀️
66°F
6 AM
☀️
65°F
7 AM
☀️
66°F
8 AM
☀️
71°F
9 AM
☀️
76°F
10 AM
☀️
79°F
11 AM
☀️
82°F
12 PM
☀️
84°F
1 PM
☀️
86°F
7-day forecast
Today
Jul 29
🌫️
87°F
65°F
Thu
Jul 30
☁️
87°F
65°F
Fri
Jul 31
🌧️
84°F
65°F
68%
Sat
Aug 1
🌧️
80°F
67°F
70%
Sun
Aug 2
🌦️
78°F
64°F
21%
Mon
Aug 3
☀️
83°F
62°F
16%
Tue
Aug 4
⛈️
87°F
64°F
28%
Weather near Marion
16 mi
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Alerts are relayed from the National Weather Service and may lag
the official source. In a life-threatening situation always follow
weather.gov and local emergency
broadcasts.